Penetration Testing mailing list archives
Re: Using a Stand-Alone Network Printer as a network attack entry point?
From: "R. DuFresne" <dufresne () sysinfo com>
Date: Fri, 16 Aug 2002 12:30:04 -0400 (EDT)
Most printers in a tcp/ip setting have all the network functionality enclosed. I recall years back when I would slip into a UofM printer, then telnet off that into a printer at Mankato State, and telnet off that... So, if you can reach the printer <which, if the network folks know their stuff, yer not able to get to from the outside, and should be forbidden to go outside from if you are sitting within the soft-chewy center>, yer already there <smile>. Jetdirect cards have never been a security item...why even try to reinvent the wheel? Unless I'm misunderstanding you here. Thanks, Ron DuFresne On Thu, 15 Aug 2002, Nick Jacobsen wrote:
Hi all... I came up with an idea, one that I've never heard discussed, of possibly modifying a stand-alone network printer (like most of the high-end office printers, hereafter referred to as a "SNP") to act as a full point to point proxy, or at least a simple pass through to the port and IP you specify in some sort of configuration. The idea here would be to take a SNP and modify a ROM image for the specific printer to include the proxy functionality. I realize this could turn out to be quite difficult, but at the same time, it would provide a way into the internal network when no others are available. Any comments are most DEFINITELY welcome, flames less so, but if it's a stupid idea, let me know... Nick Jacobsen nick () ethicsdesign com ethics () netzero net ---------------------------------------------------------------------------- This list is provided by the SecurityFocus Security Intelligence Alert (SIA) Service. For more information on SecurityFocus' SIA service which automatically alerts you to the latest security vulnerabilities please see: https://alerts.securityfocus.com/
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ admin & senior security consultant: sysinfo.com http://sysinfo.com "Cutting the space budget really restores my faith in humanity. It eliminates dreams, goals, and ideals and lets us get straight to the business of hate, debauchery, and self-annihilation." -- Johnny Hart testing, only testing, and damn good at it too! ---------------------------------------------------------------------------- This list is provided by the SecurityFocus Security Intelligence Alert (SIA) Service. For more information on SecurityFocus' SIA service which automatically alerts you to the latest security vulnerabilities please see: https://alerts.securityfocus.com/
Current thread:
- Using a Stand-Alone Network Printer as a network attack entry point? Nick Jacobsen (Aug 16)
- RE: Using a Stand-Alone Network Printer as a network attack entry point? Ofir Arkin (Aug 16)
- Re: Using a Stand-Alone Network Printer as a network attack entry point? Security News (Aug 16)
- Re: Using a Stand-Alone Network Printer as a network attack entry point? R. DuFresne (Aug 16)
- <Possible follow-ups>
- RE: Using a Stand-Alone Network Printer as a network attack entry point? Bernt Lervik (Aug 19)
- Re: Using a Stand-Alone Network Printer as a network attack entry point? Nick Jacobsen (Aug 19)